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12.65+0.09s=13.40-0.15s
We move all terms to the left:
12.65+0.09s-(13.40-0.15s)=0
We add all the numbers together, and all the variables
0.09s-(-0.15s+13.4)+12.65=0
We get rid of parentheses
0.09s+0.15s-13.4+12.65=0
We add all the numbers together, and all the variables
0.24s-0.75=0
We move all terms containing s to the left, all other terms to the right
0.24s=0.75
s=0.75/0.24
s=3+0.03/0.24
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